Medium severity · published Mar 24, 2021
CVE-2021-1423
A vulnerability in the implementation of a CLI command in Cisco Aironet Access Points (AP) could allow an authenticated, local attacker to overwrite files in the flash memory of…
4.4
CVSS
0.2%
EPSS
No
On KEV
Description
A vulnerability in the implementation of a CLI command in Cisco Aironet Access Points (AP) could allow an authenticated, local attacker to overwrite files in the flash memory of the device. This vulnerability is due to insufficient input validation for a specific command. An attacker could exploit this vulnerability by issuing a command with crafted arguments. A successful exploit could allow the attacker to overwrite or create files with data that is already present in other files that are hosted on the affected device.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
Aironet Access Point Software · Cisco
All versions, or not specified · source: NVD
C9
Catalyst 9800 Firmware · Cisco
before 16.12.5; 17.1 through 17.2 · source: NVD
WL
Wireless Lan Controller Software · Cisco
before 8.5.171.0; 8.6 before 8.10.130.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-1423
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-1423
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-foverwrt-HyVXvrtb
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